Every RV owner has wondered about this question since there are tons of these types of products being sold in the market. The following are the best Portable RV slide out covers one can find on the market for sale:

First, there is the 8' x 36" Dura-Fold Portable RV slide out covers from Dura-Bilt Products, Inc. With this product RV slide outs can be protected from damage caused by weather and water conditions. There is an option to buy this with or without a decorative valance. It can be easily folded down and locked during off seasons. Take note that this must be removed during travel. It has a 3" insulated white aluminum roof and it includes mounting rails and hardware for installation. The customer can choose from various optional fabric valance colors like blue, brown, rust, burgundy, gray, teal and green. There is a five year limited warranty for this US-made product.

Next, is the 8' x 48" Dura-Fold Portable RV slide out covers. Another product from Dura-Bilt Products, this is also a protective cover for RV slide outs. The materials are the same as the smaller 8' x 36" RV slide out covers of the same brand. Even through harsh weather, RV owners can rest easy that their slide outs are safe from damage. It also comes with the same 3" insulated white aluminum roof as well as mounting rails and hardware for installation. Color choices for fabric valances are also varied to fit the RV owner's color preferences.